Results 81 to 90 of about 2,815,679 (232)

Near‐Infrared Light‐Driven Photocatalysis: From Advanced Light‐Harvesting Architectures to Rational Reactor Design

open access: yesEcoEnergy, EarlyView.
This review systematically elucidates the regulatory strategies for NIR light, encompassing macroscopic mechanisms such as band engineering, localized surface plasmon resonance (LSPR), upconversion luminescence, and photosensitizer molecules. Furthermore, it provides an in‐depth discussion on their cutting‐edge applications in energy conversion (e.g ...
Huijuan Wang   +8 more
wiley   +1 more source

Synthesis of Coumarins via Pd-Catalyzed Oxidative Cyclocarbonylation of 2‑Vinylphenols

open access: yes, 2016
Palladium-catalyzed oxidative cyclocarbonylation of 2-vinylphenols constitutes a simple, direct method for the synthesis of coumarins. The reaction conditions, employing low pressures of CO, and air or 1,4- benzoquinone as the oxidant, are attractive in ...
Howard Alper (1528849)   +2 more
core   +1 more source

MELD score predicts outcomes in patients with advanced heart failure: A longitudinal evaluation

open access: yesESC Heart Failure, Volume 12, Issue 2, Page 839-847, April 2025.
Abstract Aims Advanced heart failure (AHF) is characterized by recurrent episodes of haemodynamic instability and frequent hospitalizations, leading to a progressive decline in quality of life and high mortality rates. The objectives of this study were to evaluate the effect of the model for end‐stage liver disease (MELD) score and its variations in ...
Francesco Curcio   +10 more
wiley   +1 more source

Synthetic Strategies for the Construction of Cyclobutane‐Fused Heterocycles

open access: yesEuropean Journal of Organic Chemistry, EarlyView.
Cyclobutane‐fused heterocycles are important motifs commonly present in bioactive compounds, recognized for their rigid 3D structures that confer unique properties. However, synthesizing these compounds remains challenging. This review discusses current methods for their synthesis, such as photochemical, metal‐catalyzed, and Lewis acid‐mediated [2 + 2]
Michela Vargiu   +2 more
wiley   +1 more source

Recyclable Boron Sulfonic Acid as an Environmentally Benign Catalyst for the One-Pot Synthesis of Coumarin Derivatives under Solvent-Free Condition [PDF]

open access: yesJournal of Sciences, Islamic Republic of Iran, 2014
A mild and green method has been developed for the preparation of coumarins derivatives through the one-pot reactions. In our study,various phenols and ethyl acetoacetate compound in which we used silica-supported boron sulfonic acid [SiO2/B(SO4H)3] as a
S. Rezayati, S. Sajjadifar
doaj  

Techniques for Analysis of Plant Phenolic Compounds

open access: yesMolecules, 2013
Phenolic compounds are well-known phytochemicals found in all plants. They consist of simple phenols, benzoic and cinnamic acid, coumarins, tannins, lignins, lignans and flavonoids.
Thomas H. Roberts   +2 more
doaj   +1 more source

Mango Seed Valorization: Sustainable Source of Nutrients, Bioactives, and Value‐Added Applications

open access: yesFood Chemistry International, EarlyView.
Highlighting mango seed as a valuable yet overlooked by‐product, promoting its utilization and reducing agroindustrial waste. ABSTRACT Mango (Mangifera indica L.) is one of the most widely cultivated tropical fruits, generating large quantities of by‐products during processing, with mango seed representing 20%–25% of the whole fruit weight ...
Priyanka Yadav   +3 more
wiley   +1 more source

Novel coumarins active against Trypanosoma cruzi and toxicity assessment using the animal model Caenorhabditis elegans

open access: yesBMC Pharmacology and Toxicology, 2019
Background Chagas disease (CD) is a tropical parasitic disease. Although the number of people infected is very high, the only drugs available to treat CD, nifurtimox (Nfx) and benznidazole, are highly toxic, particularly in the chronic stage of the ...
Fabiana Gomes Nascimento Soares   +15 more
doaj   +1 more source

Coumarins as antioxidants.

open access: yes, 2011
Coumarins, a well-known class of naturally occurring compounds, display a remarkable array of biochemical and pharmacological actions, some of which suggest that certain members of this group of compounds may significantly affect the function of various ...
I. Kostova   +6 more
core  

Evaluation of Nutritional and Bioactive Compounds in Tea and Botanical Marc Following Industrial Liqueur Maceration

open access: yesFood Chemistry International, EarlyView.
Industrial botanical marc retained valuable phytochemicals, antioxidants, catechins, and caffeine after ethanol maceration, with composition varying by botanical source and processing. These underutilized by‐products represent promising, safe, and sustainable feedstocks for recovering bioactive compounds for food, nutraceutical, and functional ...
Veronika Šimora   +7 more
wiley   +1 more source

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